Full list of all 50 Alien: Isolation achievements worth 1,000 gamerscore. It takes around 40-50 hours to unlock all of the achievements on Xbox One.
Completed the game without killing any humans
Completed the game without dying
Navigated Reactor Maintenance without dying
Completed "The Quarantine" without being killed by the Alien
Collected all ID tags
Collected 10 Nostromo logs in the main campaign
Killed by the Alien 100 times
Completed the game on the hardest difficulty setting
Completed the game on any difficulty setting
Completed "Tomorrow, Together"
Completed "Desolation"
Completed "Transmission"
Completed "The Message"
Completed "The Descent"
Completed 10 minigames successfully
Killed an android using only the maintenance jack
Used the bolt gun
Completed "Consultation"
Collected 100 archive logs
Completed "A Synthetic Solution"
Accessed 10 different rewire points
Completed "Hazard Containment"
Used the shotgun
Completed "The Trap"
Used the flamethrower
Caused the Alien to retreat by using the flamethrower
Turned off the beacon
Knocked down a human or stunned an android with a non-lethal attack
Killed 10 humans
Completed "Seegson Synthetics"
Performed 10 successful hacks
Detected 30 targets with the motion tracker
Completed "The Outbreak"
Caused the Alien to retreat using a molotov
Constructed one of each craftable item
Used the revolver
Used the stun baton
Completed "The Quarantine"
Completed "Seegson Communications"
Killed an Android
Contacted your team and escaped Comms without being attacked by an android
Escaped from android combat without taking damage
Completed "Encounters"
Encountered the Alien in Sevastopol for the first time
Used the vent system 20 times
Completed "Welcome to Sevastopol"
Collected an ID tag
Constructed an item
Completed "Closing the Book"
Collected an archive log